QRasterWindow 类

QRasterWindow is a convenience class for using QPainter 在 QWindow . 更多...

头：	#include <QRasterWindow>
qmake:	QT += gui
Since:	Qt 5.4
继承：	QPaintDeviceWindow

公共函数

	QRasterWindow (QWindow * parent = nullptr)
virtual	~QRasterWindow ()

2 公共函数继承自 QPaintDeviceWindow
82 公共函数继承自 QWindow
14 公共函数继承自 QPaintDevice
31 公共函数继承自 QObject
6 公共函数继承自 QSurface

静态公共成员

const QMetaObject

staticMetaObject

1 静态公共成员继承自 QWindow
9 静态公共成员继承自 QObject

额外继承成员

16 特性继承自 QWindow
1 特性继承自 QObject
1 公共槽继承自 QPaintDeviceWindow
24 公共槽继承自 QWindow
1 公共槽继承自 QObject
18 信号继承自 QWindow
2 信号继承自 QObject
1 保护函数继承自 QPaintDeviceWindow
18 保护函数继承自 QWindow
1 保护函数继承自 QPaintDevice
9 保护函数继承自 QObject

详细描述

QRasterWindow is a convenience class for using QPainter 在 QWindow .

QRasterWindow 是 QWindow with a raster-based, non-OpenGL surface. On top of the functionality offered by QWindow , QRasterWindow adds a virtual paintEvent () function and the possibility to open a QPainter on itself. The underlying paint engine will be the raster one, meaning that all drawing will happen on the CPU. For performing accelerated, OpenGL-based drawing, use QOpenGLWindow 代替。

Internally the class is thin wrapper for QWindow and QBackingStore and is very similar to the 光栅窗口范例 that uses these classes directly.

另请参阅 QPaintDeviceWindow::paintEvent () 和 QPaintDeviceWindow::update ().

成员函数文档编制

QRasterWindow:: QRasterWindow ( QWindow * parent = nullptr)

构造新的 QRasterWindow with parent .

`[虚拟]` QRasterWindow:: ~QRasterWindow ()

Destroys the instance of QRasterWindow. The destructor is virtual.

内容